If you’re using the web app: To set Two Factor Authentication, go to your Profile and view the Settings option which is on the right. The third option under settings is Two-factor authentication - toggle the button to the right to enable it. Enter your password to complete the authentication.
If you’re using the mobile app: Open the onship homepage and click on the Settings icon in the top left corner. Select Securtiy Settings > Two-factor authentication > toggle the button to the right and then enter your password to authenticate your mobile device.